Fixed performance regression in CompData's use of SimpData
Fixed performance regression in CompData's use of SimpData

Requesting a single OID tree from SimpData, even if there's a lot of
results, is faster than requesting many individual OIDs from SimpData.

I had not realized this in my work leading up to 1.0.5, leading me
to commit a mistake that had apparently been committed earlier.

This change fixes that regression by going back to one-subtree instead
of many-individual-OIDs.

GlobalNOC/simp,GlobalNOC/simp,GlobalNOC/simp,GlobalNOC/simp,GlobalNOC/simp